In service-oriented system, by using service selection methods, service entities can be dynamically bound to abstract services. Major of current system have assumed that candidate services are independent of each other. However, recent research has discovered that services do have correlations which will impact Quality-of-Service (QoS) of the composition service [9]. This paper outlines the service-correlation-aware service selection approach, gives a detailed system design, and implements it as an Eclipse plug-in and integrates it into a composite service development environment. To demonstrate the practical utilization of this approach, we employ it to development of a travel agency system. The exploitation further validate that this solution can be applied to a large extent.